<h3 id="heading-what-are-jwtjson-web-tokens">What are JWT(Json Web Tokens)?</h3>
<ul>
<li>Pronounced as  jot(JWT)</li>
<li>It is a means of transferring information between parties using JSON object.</li>
</ul>
<p>It consist of three parts separated by dot(.)</p>
<ul>
<li>Header.payload.signature</li>
<li>like xxxx.yyyy.zzzz</li>
</ul>
<p>a typical JWT look like this :</p>
<p><img src="https://cdn.hashnode.com/res/hashnode/image/upload/v1659021612763/bH0VGhptg.png" alt="jwt.png" /></p>
<p>Header contains two parts</p>
<ul>
<li>type of token which is JWT.</li>
<li>hashing algorithm</li>
</ul>
<p>Payload contain claims which can be reserved,public,private.</p>
<p>Signature
for creating signature we take encoded header,encoded payload and sign that.</p>
<p><img src="https://cdn.hashnode.com/res/hashnode/image/upload/v1659021580040/rObaKNpFb.png" alt="jwt1.png" /></p>
<h3 id="heading-how-jwt-works">How JWT works?</h3>
<p>  An example</p>
<ul>
<li>when a user sends a post request to the server (like login), a JWT will be returned.</li>
<li>the server will check for a valid JWT .</li>
<li>if there is a valid JWT user will be allowed to access the protected page!</li>
</ul>
<h3 id="heading-why-use-jwt">Why use JWT?</h3>
<p>-small in size</p>
<ul>
<li>more secured due to digital signature</li>
<li>easier to process.
-stateless authentication (user is not saved in server memory)</li>
<li>reduces need to go back and forth to database for information</li>
</ul>
<h3 id="heading-common-use-cases">Common Use Cases :</h3>
<ul>
<li>Authentication</li>
<li>Authorization</li>
<li>Information exchange</li>
</ul>


### What are JWT(Json Web Tokens)?

- Pronounced as  jot(JWT)
- It is a means of transferring information between parties using JSON object.

It consist of three parts separated by dot(.)

- Header.payload.signature
- like xxxx.yyyy.zzzz

a typical JWT look like this :


![jwt.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1659021612763/bH0VGhptg.png align="left")

Header contains two parts

- type of token which is JWT.
- hashing algorithm

Payload contain claims which can be reserved,public,private.

Signature
for creating signature we take encoded header,encoded payload and sign that.


![jwt1.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1659021580040/rObaKNpFb.png align="left")

### How JWT works?

  An example
- when a user sends a post request to the server (like login), a JWT will be returned.
- the server will check for a valid JWT .
- if there is a valid JWT user will be allowed to access the protected page!

### Why use JWT?

-small in size
- more secured due to digital signature
- easier to process.
-stateless authentication (user is not saved in server memory)
- reduces need to go back and forth to database for information

### Common Use Cases :

- Authentication
- Authorization
- Information exchange

everything you need to know about JWT

What are JWT(Json Web Tokens)?

How JWT works?

Why use JWT?

Common Use Cases :

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What are JWT(Json Web Tokens)?

everything you need to know about JWT

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